Fixing means for traveler rings of ring spinning and ring twisting machines



2,199,795 y 7, 1940- c. F. HOFMANN FIXING MEANS FOR TRAVELER RINGS 0F RING SPINNING AND RING TWISTING MACHINES Filed May 31, 1938 S Sheets-Sheet 1 FIG./ 5 23 20 4 5 IIIIIIII-\\ I v renfoz 6. E #02 1? 2,199,795 c. F. HOFMANN FIXING MEANS FOR TRAVELER RINGS OF RING SPINNING AND RING 'I'WISTING MACHINES Filed May 31, 1938 3 Sheets-Sheet 2 .55 a 5 Affor-m y muse May 7, 1940. c. F. HOFMANN FIXING MEANS FOR TRAVELER RINGS 0F RING SPI AND RING TWISTING MACHINES Filed May 31, 1938 3 Sheets-Sheet 3 a ,2 If! vento r' Patented May 1940 I UNITED I STATES FIXING MEANS FOR TRAVELER RINGS or RING SPINNING AND RING TWISTING MACHINES Carl Fritz Hofmann, Siegmar-Schonau, Germany Application May 31, 1938, Serial No. 211,081

a 8 Claims.

The traveler rings of ring spinning and ring twisting machines are mounted in corresponding borings in a ring bar. When this ring bar is made of wrought iron or cast iron the fixing of the rings in the ring bar by a horizontal clamping screw for each one entails no difficulty. One disadvantage of this method of fixation, however, is that the horizontal clamping screw is only accessible either from the front or from behind the ringbar with a screw driver and not from above. When the clamping screw is situated on the rear side of the ring bar, the clamping screw can hardly be got at with a screw driver, and the ring bar has to be taken out of the ring rail for this purpose.

Recently ring bars have been made of sheet iron or sheet steel for the purpose of effecting a saving in both material and weight. Since these sheet steel ring bars or rails are only of very small thickness it is not possible to insert a horizontal clamping screw in them as has hitherto been usual.

The present invention now makes it possible notwithstanding the small thickness of the ring bar, to provide within it an effective "clamping arrangement which in practice does not project either above or below the ring bar. According to the present invention a pressure member is provided which projects into the boring of the ring bar and can be got at from above and is also adjustable, and this by reason of its adjustability enables the ring, which is provided with a recess. to be inserted in the boring and the member engages in the said recess and thereby clamps the ring fast in the boring.

In a particularly advantageous construction according to the present invention the pressure member consists of a round or eccentric clamping disc which projects into the boring in the ring bar and is adjusted by means of a screw inserted vertically into the ring bar for the purpose of clamping the ring in position;

The clamping arrangement according to this invention is also so arranged that both a pressure on the ring at right angles to the ring bar and also a pressure which acts in the plane of the ring bar and presses the ring against the side of the boring in the ring bar opposite the pressure area is thereby produced. For this purpose it is advantageous to provide an inclined surface in conjunction with the pressure surface.

Various constructional forms of a clamping device according to this invention are shown in the drawings in which:

Germany January 24, 1938 Fig. 1 is a vertical section through a traveler ring fixed in a ring bar.

Fig. 2 is a plan view of the clamping arrangement shown in Fig. 1. 1

Figs. 3 to 6 are sectional views showing other 5 constructional forms of' the clamping arrangement on a larger scale.

Figs. '7 and 8 show another construction in plan and in vertical section and partly in plan.

Fig. 9 shows another particularly advantageous 1 constructional form of a clamping arrangement in section and on a larger scale.

Fig. 10 shows the same clamping fixation with the screw slacked off.

Fig. 11 is a plan view of the clamping arrangement shown in Fig. 9.

Fig. 12 is a partial elevation of the traveler ring looking in the directtion A of Fig. 11.

Fig. 13 is a plan view of a further modified form of the clamping ring.

In Figs. 1 and 2, i denotes a traveler ring, 2 is the head of the ring and 3 is the foot of the ring which is inserted in a ring bar 5 of sheet steel a few millimetres thick. In the constructions shown in Figs; 1 to 3 the traveler ring has at its foot a cone shaped annular groove 6, which is located immediately below the collar 36 lying on the ring rail. In this annular groove engages a pressure plate which accordingly also projects into the boring in the ring bar and may be of various shapes within the scope of this invention. As shown in Figs. 1 and 2 a clamping device formed from a single piece is provided. This device consists of a round clamping disc II with a screw thread l2. The round disc II projects with its peripheral part I3 into the boring 4 in the ring bar and into the conical annular groove 6 in the ring I and presses onto the inclined surface H thereof. As is shown in the drawings the clamping disc II and also the screw are countersunk into the ring bar so that the whole clamping device does not project either on the upper or underside of the ring bar. No fluff from the thread can therefore settle on the clamping device and furthermore the cleaning of the ring bar is very greatly facilitated. The loosening and fixing of the traveler ring in this clamping device can be effected in a very simple manner. To loosen the ring it is only necessary to slack off the screw one revolution for example by a screw driver inserted in an appropriate slot IS in the clamping disc whereupon the ring I can be lifted out of the boring 4 at once without complete removal of the clamping device ll l2 being necessary. The ring can be just as easily 5 inserted again into the ring by reversing the order of these operations. When tightening the screw l2, the clamping disc I I acts on the inclined surface M of the traveler ring I so that the latter is pressed on the one hand in the direction B on the ring bar 5 and, on the other hand in the direction A against the side of the ring bar boring 6 opposite the clamping disc.

In Fig. 3 is shown a somewhat difierent construction of a clamping disc. In this case the ring bar 5 has an annular recess l1 milled in it in such a way that the full thickness of the ring bar is retained for the screw thread l8.

The clamping device shown in Figs. 1 and 3 may consist as in that shown in Fig. 4, of two parts namely a clamping disc i9 and a clamping screw 20 with a countersunk head 2|.

If the traveler ring I and the clamping device be accurately made a rectangular annular groove 22, Fig. 4, may also, if desired, be provided in the foot 3 of the ring instead of a conical groove. By arranging the boring 23 eccentrically in the clamping disc i9 a certain movement of the clamping disc in the direction indicated by arrow A can be obtained when tightening up the screw 20 so that in this case also the ring will be firmly pressed at the opposite point against the boring in the ring bar.

Whereas in the construction shown in Figs. 1 to 3 an inclined surface is provided in the form of a conical annular groove 6 on the traveler ring, this inclined surface may also be located as shown in Fig. 5 on a clamping disc. This clamping disc has a downwardly bevelled peripheral part 21 which engages in a rectangular groove 28 in the foot 3 of the ring. If need be an inclined surface may of course be also provided on both the clamping disc and in the foot of the ring.

Whereas in the above mentioned constructions the clamping disc is countersunk in the ring bar, a clamping disc 29 such as shown in Fig. 6 may also be provided on the underside of the ring bar 5, this being provided with a screw-threaded pin 30 having a slot 3| in it to enable the clamping device to be conveniently removed from above.

Figs. 7 and 8 show a round clamping disc 33 which is countersunk in the ring bar 5 and of which a portion of the periphery, which projects into the boring in the ring bar, is cut away. The part 34 of this clamping disc is preferably adapted to fit the annular groove in the traveler ring so that the clamping disc 33 exerts a clamping action uniformly on the ring over a greater length. The eccentric arrangement shown of screw 35 which holds the clamping disc, prevents this disc from rotating.

In Figs. 9 to 12 is shown a particularly advantageous constructional form of a clamping attachment which is not only cheap to manufacture and can be very conveniently inserted and removed from the traveling ring but also clamps the latter extremely well. In this construction inclined surfaces are provided between both the head of the screw which holds the clamping disc and the clamping disc itself and between the clamping disc and the traveler ring, and the former of these so centres the clamping disc when the screw is tightened up, so that its edge is forced into the boring in the ring bar or into a recess in the traveler ring. In the constructional example shown in Fig. 9 and 10 a screw 31 with a flat rounded off head 38 and a cone 39 underneath it is provided. As shown in the drawings the clamping disc 60 which serves to fix the ring I has a cylindrical boring 4| which is preferably nearly as large as the greatest diameter of the cone 33, as can be seen from Fig. 9. This construction has the advantage -firstly that, as shown in Fig. 9, the head 33 of the clamping screw hardly bears on the clamping disc 40 when the screw is tightened up so that scarcely a gap is left at the point 42. The important point however is that in theabove mentioned construction the clamping disc can be pushed so far back in the direction indicated by arrow D (Fig. 10) when the screw is loosened that its edge portion 43 no longer projects or projects only very slightly into the recess 44 in the ring I. Fig. 10 clearly shows that the ring I can be removed freely upwards and also inserted again just as freely into the ring bar 5. When the screw 31 is tightened up, the clamping disc 40 shown in Fig. 9 will be so centered by the cone 39 thatit is pressed into the recess 44 and against the conical surface 45.

As shown in the drawings the clamping disc 40 is not countersunk in the ring bar but lies on its surface. No costly milling work is therefore necessary. As can be seen from Fig. 9 in conjunction with Fig. 11 the recess 44 in the ring collar 36 lying on the ring bar is cut with a milling cutter and is in the form of a recess such as is cut with a conical milling cutter. This milled recess which is easy to produce and which can also be provided in the foot of the ring has at the same time the advantage that turning of the traveler ring I in the ring bar is rendered impossible. This is particular important for rings with wick lubrication, since if the ring twists, the outwardly extending wicks may easily become jammed or cut off. In the advantageous construction shown, the clamping disc 40 consists of a spring ring provided with a slot 46. By means of this spring ring a secure and yet elastic clamping is obtained. The head 38 of the screw in this construction can be tightened up directly until it bears on the spring ring as the latter can bend slightly. The spring ring prevents also any loosening of the clamping screw 31.

In a further constructional form of the clamping disc as a ring shown in Fig. 13 it is eccentric in such a way that the narrow part 40b of the ring 40a, when the traveler rings fit well, and the wide part 400 of the ring, when the rings fit with much play, in the boring in the ring bar, can be brought into the recess 44. The traveler rings sometimes contract through the hardening to a certain degree so that a large amount of play between the traveler ring and the boring in the ring bar has to be reckoned with. In such event the above mentioned clamping ring construction is of advantage. In order to enable the clamping screw 31 to be powerfully tightened up without having to use a polygonal screw head it is provided with a polygonal opening 41 running right through it and into which a suitably formed key can be inserted.

The arrangement is not limited to ring bars made of sheet steel but can also be used with the same advantages as those mentioned above on ring bars which are made of other materials.

Having now particularly described and ascertained the nature of my said invention, and in what manner the same is to be performed, I declare that what I claim is:

1. Fixing means for traveler rings of ring spinning and ring twisting machines, mounted in' borings in a ring bar, comprising in combination a round adjustable clamping disc projecting into the boring in the ring bar, a vertical screw screwed into said ring bar for adjusting the clamping disc, and a traveler ring with a recess in which engages said clamping disc, inclined surfaces between the head of said screw and said clamping disc and inclined surfaces between said clamping disc and the traveler ring, of which the former, when said screw is tightened up, centres the clamping disc in such a way that it is forced with its edge into the boring in the ring bar and into the recess in the traveler ring. 7

2. Fixing means for traveler rings of ring spinning and ring twisting machines, mounted in borings in a ring bar, comprising in combination an adjustable pressure disc projecting into the boring in the ring bar and provided with a boring, a traveler ring with a recess in which engages said clamping disc, and a screw with a conical head passing through said clamping disc, the diameter of the boring in said clamping disc being nearly as large as the greatest diameter of the cone.

3. Fixing means for traveler rings of ring spinning and ring twisting machines, mounted in borings in a ring'bar, comprising in combination an adjustable clamping disc with a boring projecting into the boring in the ring bar and lying on the surface of said ring bar, a traveler ring with a recess for engaging of said clamping disc, and ascrew for adjusting said clamping disc, having a flat rounded off head and a cone underneath it.

4. Fixing means for traveler rings of ring spinning and ring twisting machines, mounted in borings in a ringbar, comprising in combination a. round adjustable clamping disc projecting into the boring in the ring. bar, a vertical screw screwed into said ring bar for adjusting the clamping disc, and a traveler ring with a recess in which engages said clamping disc, said clamping disc and screw being countersunk in said ring bar so that they do not project on the upper or under side of said ring bar.

5. Fixing means for traveler rings of ring spinning and ring twisting machines, mounted in borings in a ring bar, comprising in combination an adjustable spring ring provided with a slot projecting into therboring in said ring bar, a vertical screw screwed through this ring into said ring bar for adjusting the spring ring, and a traveler ring with a recess in which engages said spring ring.

6. Fixing means for traveler rings of ring spinning and ring twisting machines, mounted in borings in a ring bar, comprising in combination a round adjustable clamping disc projecting into the boring in the ring bar, a vertical screw screwed into said ring bar for adjusting the clamping disc, and a traveler ring with a recess in which engages said clamping disc, said screw having a polygonal opening therethrough for inserting a correspondingly formed key.

'7. A traveler ring for fixing means as claimed in claim 1, with a recess produced by a milling cutter at the outer periphery for engaging of the clamping disc which at the same time secures said ring against turning.

8. Clamping arrangement for traveler rings of ring spinning and ring twisting machines, which are mounted in borings of a ring rail of sheet steel, comprising for each traveler ring a single clamping disc extending into the ring rail boring, a screw operable from above for firmly clamping the traveler ring with the clamping disc, a lateral recess in the traveler ring in which the clamping disc extends and an inclined surface by means of which, when tightening the 'screw, the clamping disc acts on the traveler ring in such a manner that this ring is pressed on one hand onto the ring rail and on the other hand against the side of the ring rail boring opposite the clamping disc.

CARL FRITZ HOFMANN. 40 

